Check Spark and H2O environment, update it if necessary and and warn about possible problems.
H2O Configuration to check
checked and updated configuration
Get common arguments for H2O client.
array of H2O client arguments.
Get H2O arguments which are passed to every node - regular node, client node
sequence of arguments
Produce arguments for H2O node based on provided configuration and environment
array of H2O launcher command line arguments
Return hostname of this node based on SparkEnv
hostname of the node